Coolant additive package



FIG. 1 is a perspective view, taken from the front, right side, of a coolant additive package in accordance with an embodiment of my new design;

FIG. 2 is a front elevation view of the coolant additive package shown in FIG. 1;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a left-side elevational view thereof; and,

FIG. 6 is a top view thereof. 

CLAIM The ornamental design for a coolant additive package, as shown and described. 